Nothing major, just copy-and-paste from master branch to replace aging
code examples, and a little grammmar cleanup.
(From yocto-docs rev: 74057a1ffd682754e81f5f7fbde9f233e14a0d00)
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>